Gently into November

I have just put an update for the Gentle Introduction to category theory online. Things have been moving pretty slowly (pressure of other interests, a planned chapter not really working out, spending far too much time revising earlier chapters, etc.); but we’ve inched forward to 157 fun-packed pages. Again, this version is stopping far short of a natural break point. But I’ll not be able to return to this for a few weeks, so I thought I should at least make available the best version of the earlier chapters I now have, and I can add three new chapters. (I note the newly added Theorem 63 which corrects a terrible blunder in some remarks in an earlier version! No promises that there aren’t more blunders to be found.)